“People don’t understand what the danger is to tower climbing,” former climber Robert Hale says in the film. “One person drops a wrench, it’ll kill somebody.”

So why do they do it? What’s the work really like? How much pressure are they under, day to day?

We asked Wally Reardon, a former cell tower worker who appears in the film, to take your questions about the job, the industry and his experiences. From 1992-2002, Wally worked as a climber on building and servicing communication towers. Today, he’s the project manager for Tower Climber Protection Project.

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